Subclinical hyperthyroidism as a potential factor for dysfunctional uterine bleeding.

Objective: To evaluate the functional status of the thyroid gland in apparently euthyroid women with dysfunctional uterine bleeding.

Materials And Methods: Forty apparently euthyroid women with menorrhagia and no pathologic lesion in the genital tract were compared with 20 women having normal menstrual cycles as controls. All women underwent hormonal evaluation: serum total and free triiodothyronine (T3), thyroxine (T4), thyroid-stimulating hormone (TSH) and serum prolactin.